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CVE-2020-2803

Vulnerability in java (CVE-2020-2803)

Summary

Vulnerability in java (CVE-2020-2803). Successful exploitation can lead to full system takeover. Mitigation: upgrade to 1.7.0, 1.8.0, 7.0.261, 8.0.251, 11.0.7, 14.0.1 or later.

Original description

The description as published by the source.

Vulnerability in the Java SE, Java SE Embedded product of Oracle Java SE (component: Libraries). Supported versions that are affected are Java SE: 7u251, 8u241, 11.0.6 and 14; Java SE Embedded: 8u241. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Java SE, Java SE Embedded. Successful attacks require human interaction from a person other than the attacker and while the vulnerability is in Java SE, Java SE Embedded, attacks may significantly impact additional products. Successful attacks of this vulnerability can result in takeover of Java SE, Java SE Embedded. Note: This vulnerability applies to Java deployments, typically in clients running sandboxed Java Web Start applications or sandboxed Java applets, that load and run untrusted code (e.g., code that comes from the internet) and rely on the Java sandbox for security. This vulnerability does not apply to Java deployments, typically in servers, that load and run only trusted code (e.g., code installed by an administrator). CVSS 3.0 Base Score 8.3 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H).

Source: OSV.dev (Open Source Vulnerabilities) NVD OSV

Auto-generated summary

Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.

A vulnerability tracked as CVE-2020-2803 has been found in java.
Successful exploitation can lead to full system takeover.
What to do: upgrade java to 1.7.0, 1.8.0, 7.0.261, 8.0.251, 11.0.7, 14.0.1 or later.
If unsure, ask your IT team or search "java CVE-2020-2803" on the vendor's site.

CVE-2020-2803 (java)
Attack vector: remote (network-reachable) / unauthenticated
Patched: 1.7.0, 1.8.0, 7.0.261, 8.0.251, 11.0.7, 14.0.1 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.

❓ What is the problem

A vulnerability (unclassified) exists in java.

📍 Affected scope

Check the vendor advisory for the affected versions of java.

🔥 Severity

Severity: ?. Successful exploitation can lead to full system takeover.

🔧 How to fix

Update to 1.7.0, 1.8.0, 7.0.261, 8.0.251, 11.0.7, 14.0.1.

🛡️ Workaround

Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.

🔍 Detection

Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'java' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.

Response actions

Concrete steps and command examples for SOC/SRE teams to execute in order

  1. 1
    Identify exposure identify 
    grep -r 'java' . | grep -v node_modules

    リポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で java を grep し、稼働しているサービス・バージョンを把握する。

  2. 2
    Apply patch patch 
    Upgrade java to 1.7.0, 1.8.0, 7.0.261, 8.0.251, 11.0.7, 14.0.1

    ステージング環境で 1.7.0, 1.8.0, 7.0.261, 8.0.251, 11.0.7, 14.0.1 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。

  3. 3
    Post-deployment verification verify 
    Confirm patched version is live in production

    パッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。

Affected packages

Bitnami java
[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.7.0"},{"introduced":"1.8.0"},{"fixed":"1.8.0"},{"introduced":"7.0.0"},{"fixed":"7.0.261"},{"introduced":"8.0.0"},{"fixed":"8.0.251"},{"introduced":"9.0.0"},{"fixed":"11.0.7"},{"introduced":"12.0.0"},{"fixed":"14.0.1"}]}]
Bitnami java-min
[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.7.0"},{"introduced":"1.8.0"},{"fixed":"1.8.0"},{"introduced":"7.0.0"},{"fixed":"7.0.261"},{"introduced":"8.0.0"},{"fixed":"8.0.251"},{"introduced":"9.0.0"},{"fixed":"11.0.7"},{"introduced":"12.0.0"},{"fixed":"14.0.1"}]}]
Bitnami jre
[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.7.0"},{"introduced":"1.8.0"},{"fixed":"1.8.0"},{"introduced":"7.0.0"},{"fixed":"7.0.261"},{"introduced":"8.0.0"},{"fixed":"8.0.251"},{"introduced":"9.0.0"},{"fixed":"11.0.7"},{"introduced":"12.0.0"},{"fixed":"14.0.1"}]}]

Fix status by distribution

Fixed packages published by each distribution for this CVE

References

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